netdev - Re: Kernel doesn't propagate DNSSL to userspace (e.g. NetworkManager)

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Message-ID: <1337784393.25721.5.camel@dcbw.foobar.com>
Date:	Wed, 23 May 2012 09:46:33 -0500
From:	Dan Williams <dcbw@...hat.com>
To:	Pavel Simerda <psimerda@...hat.com>
Cc:	netdev@...r.kernel.org, Dan Williams <danwilli@...hat.com>,
	danw@...me.org
Subject: Re: Kernel doesn't propagate DNSSL to userspace (e.g.
 NetworkManager)

On Wed, 2012-05-23 at 09:24 -0500, Dan Williams wrote:
> On Wed, 2012-05-23 at 04:16 -0400, Pavel Simerda wrote:
> > Hi,
> > 
> > I filed a bugreport to about lack of DNSSL support in kernel:
> > 
> > https://bugzilla.redhat.com/show_bug.cgi?id=824121
> > 
> > While NetworkManager recieves RDNSS neighbor discovery user option from kernel, it doesn't recieve DNSSL at all. This can be debugged with NetworkManager
> > (or hopefully some better testing tool) and radvdump (to check if DNSSL is present).
> > 
> > radvdump reports DNSSL is there, NetworkManager gets no netlink message from kernel.
> > 
> > kernel-3.3.4-4.fc17.x86_64
> > NetworkManager-0.9.4.0-7.git20120403.fc17.x86_64
> > 
> > Dave Jones asked me to contact this ML directly. I'm offlist.
> 
> So Pierre Ossman sent some RFC patches for DNSSL back in December 2010,
> but Dave Miller wanted actual formal submissions which Pierre never got
> around to doing.  I'll resubmit Pierre's second patch, which exports all
> options the kernel doesn't care about to userspace.
> 
> Sun, 12 Dec 2010:
> "[RFC][PATCH] Export all RA options that we don't handle to userspace"

Well, it appears that e35f30c1 from 2012-04-06 (should be in the 3.4
kernel?) actually adds support for passing DNSSL to userspace, basically
what Pierre's first patch from 2010 did.  So thanks Alexey :)  I think
we should be good now for DNSSL?

Dan

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